What meaning does the "bridge of soul" have in "Good Doctor?"

Recently, an episode of the KBS drama "Good Doctor," Park Shi On (Joo Won) and Cha Yun Seo (Moon Chae Won) continued developing their relationship as lovers. During this episode, the taro card reader told the two, "Couples that easily break up and meet over again have many bridges of soul. But there's only one bridge of soul that connects you two, which means when the bridge disappears you two can't meet again."

On the other hand, on the same episode, Na In Hae (Kim Hyun Soo) received the transplantation of her older sister Na In Young (Um Hyung Kyung)'s intestine, but did not wake up after the surgery.

People in the online community are guessing whether Na In Hae, who had taken up the role of a cupid between the two lovers, was a metaphorically "bridge of soul."

The final episode "Good Doctor" was aired on October 8, 2013.